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------------------------------------------------------------------------ r7997 | k1jt | 2017-08-03 19:18:34 +0100 (Thu, 03 Aug 2017) | 2 lines More User Guide updates. ------------------------------------------------------------------------ r7998 | bsomervi | 2017-08-04 19:03:54 +0100 (Fri, 04 Aug 2017) | 5 lines Optimize decoded text display to limit heap usage Decoded text line now use considerably less heap memory as they accumulate. This change also limits the maximum number of decode lines saved per session to 5000. ------------------------------------------------------------------------ r7999 | k1jt | 2017-08-04 19:07:23 +0100 (Fri, 04 Aug 2017) | 1 line Text and figs for User Guide on Frequency Calibration. Still need same for Reference Spectrum and Equalization. ------------------------------------------------------------------------ r8000 | bsomervi | 2017-08-04 23:00:20 +0100 (Fri, 04 Aug 2017) | 1 line Add missing MOC generated source include ------------------------------------------------------------------------ r8001 | bsomervi | 2017-08-04 23:00:35 +0100 (Fri, 04 Aug 2017) | 1 line Remove \r and \n from process stdout so Windows looks like everthing else ------------------------------------------------------------------------ git-svn-id: svn+ssh://svn.code.sf.net/p/wsjt/wsjt/branches/wsjtx-1.8@8002 ab8295b8-cf94-4d9e-aec4-7959e3be5d79
55 lines
2.3 KiB
Plaintext
55 lines
2.3 KiB
Plaintext
// Status=review
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.Receiver Noise Level
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- If it is not already highlighted in green, click the *Monitor*
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button to start normal receive operation.
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- Be sure your transceiver is set to *USB* (or *USB Data*) mode.
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- Use the receiver gain controls and/or the computer's audio mixer
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controls to set the background noise level (scale at lower left of
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main window) to around 30 dB when no signals are present. It is
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usually best to turn AGC off or reduce the RF gain control to minimize
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AGC action.
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.Bandwidth and Frequency Setting
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- If your transceiver offers more than one bandwidth setting in USB
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mode, it may be advantageous to choose the widest one possible, up to
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about 5 kHz. This choice has the desirable effect of allowing the
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*Wide Graph* (waterfall and 2D spectrum) to display the conventional
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JT65 and JT9 sub-bands simultaneously on most HF bands. Further
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details are provided in the <<TUTORIAL,Basic Operating Tutorial>>. A
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wider displayed bandwidth may also be helpful at VHF and above, where
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FT8, JT4, JT65, and QRA64 signals may be found over much wider ranges
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of frequencies.
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- If you have only a standard SSB filter you won’t be able to display
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more than about 2.7 kHz bandwidth. Depending on the exact dial
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frequency setting, on HF bands you can display the full sub-band
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generally used for one mode.
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- Of course, you might prefer to concentrate on one mode at a time,
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setting your dial frequency to (say) 14.074 for FT8, 14.076 for JT65,
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or 14.078 for JT9. Present conventions have the nominal JT9 dial
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frequency 2 kHz higher than the JT65 dial frequency on most bands, and
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the FT8 frequency 2 kHz lower.
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.Transmitter Audio Level
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* Click the *Tune* button on the main screen to switch the
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radio into transmit mode and generate a steady audio tone.
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* Listen to the generated audio tone using your radio’s *Monitor*
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facility. The transmitted tone should be perfectly smooth, with no
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clicks or glitches. Make sure that this is true even when you
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simultaneously use the computer to do other tasks such as email, web
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browsing, etc.
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* Adjust the *Pwr* slider (at right edge of main window) downward from
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its maximum until the RF output from your transmitter falls slightly.
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This is generally a good level for audio drive.
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* Toggle the *Tune* button once more or click *Halt Tx* to stop your
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test transmission.
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